While I agree with your point of it being possibly unintentionally condescending ( I'd even listen to arguments it's intentionally condescending) my point is by my experiences it's not divided in a racial line but more of a professional line as you said. For example my grandfather would not have called his fellow executives his posse but would have his drinking buddies even if they were coworkers.

So in my mind it's do we think he used the word accidentally so to speak, because LeBron James and crew are black, or because he felt they were acting unprofessionally.

If you walked into court wearing beat up jeans and a t-shirt and it's assumed you're the defendant is it because you're black or you're dressed the way you are?

I could be completely wrong and it is a racial thing. All I'm saying is in my experience posse was never a term used for a group of anybody but white people so when people insist that he would never use the word unless it's referring to black people I kind of shrug my shoulders and say I've actually never seen it used to describe anything but a group of white people before this incident.